Researchers have identified a waterhemp population in Missouri that is resistant to a record-breaking six herbicide mechanisms of action, says the Weed Science Society of America.

Kansas State University Extension shares important tips for putting together an effective pre-plant herbicide program to get on top of kochia in corn, sorghum, wheat, soybeans and sunflowers.

Getting ahead of corn and grain sorghum by using fall herbicides to control difficult winter annuals.

If the recommendations included in the EPA's assessment of ecological risk for atrazine are kept, the herbicide would be effectively banned, says the NCGA.

Dicamba, Liberty and atrazine are the most effective options for controlling marestail post-emergence in corn, and atrazine alone may not kill larger plants.

University of Nebraska-Lincoln greenhouse studies have confirmed a Palmer amaranth population resistant to postemergence application of atrazine and HPPD-inhibiting herbicides (Callisto, Laudis, Armezon/Impact). This is the second report (after Kansas) of a Palmer amaranth population resistant to atrazine and the HPPD group of herbicides.

Dry soil conditions can enhance persistence of herbicides such as atrazine, University of Kentucky experts say.